Throttle control



April 1940- M. D BOLT 2,196,626

' THROTTLE qonTRoL Filed Aug. 1, 1939 2 Sheets-Sheet 1 Leo MDeBolt INVENTIOR ATTORNEYS 'L. M. DE BOLT THROTTLE CONTROL April 9, 1940.

Filed Aug. 1, 1959 2 Sheets-Sheet 2 Leo MDe B0 Lt ATTORNEYS Patented A pr.9,i194l0 cc e I y THROTTLE CONTROL v Leo M. De Bolt, ColumbiajCitygInd. j

-Application August 1, 1939; Serial No.y2 87,815 3 Claims. o1. 74+526 f f l X This invention relates to improvements in acshowings'ame mounted for use upon conventional celerator controls especially for vehicles andthe partsofa vehicle, like. i ,Fig. 2 is essentially aside elevational view of It is an object of the invention toprovide means the preesntly preferred embodiment of accelerr for facilitating the control of acceleration in a ator controlaccording to the instant inventionil- 5 manner such'that operation of the-vehicle ata lustrating, same in conjunction with parts of a higher than selected speedexcept in emergencies conventional throttle,

is substantially'precluded. i Fig. *3 is 'a front'elevational view partially in Another object of this invention is to provide c section of the control levers showing same mount- 10 an accelerator control which can'be attached to ed upon aconventionalthrottle, to existing types of vehicles'whe'reby; to regulate "'Fig-e-is aside elevational view of the-structure operation ofthe vehicle in a manner precluding shown inFig. 3 with one of the control levers reor at least minimizing likelihood of violation of moved, speed laws. Fig-5 is a front 'elevational viewof a portion A'feature of the device according to the instant of the controlzmechanism, I I

invention is its comparative simplicity and rug- "Fig; 6' is a front-jelevationalview of the congedness of construction which, in the first introl dial' mechanism, and i stance suits'i'twell to the requirements of mass Fig. 7 is a fragmentary detail view of a part or production, and in the secondinstance minimizes the dial mechanism;

I likelihood of-failure during use or of necessity Referring" now Ito-thefigures of thedrawings,

ofexpensive repairs. U c i it will be noted that the: novel accelerator valve An advantage of the accelerator control device control accordingfto the present invention genaccordingto-this invention over certain existing erally designated by the numeral I0 comprises types of acceleratorlcontrol is that it can be'readan elbow lever ll 1 freely rotatably. mounted at. ily and quickly adjusted to the selected speed limit the juncture of its arms on the accelerator valve 35 by operation of adashboard control, whereas in s'haftQA of the accelerator valve generallydesigother types of accelerator-control now in use the nated by the letter A One of the arms Ha of hood of the engine must be raised and complithe elbow lever N is" bent outwardly in a direccated and/or delicate adjustment of the carburation essentially parallel to the axis of motion of tormust be made. i r the elbow substantiallyas shownrand carries ad- Other objects, advantages and features'of the j'ustably mounted in the free end thereof a stop w d improved accelerator 0 01 screw l2 whichis-providecl with a lock-nut 12a v to the present invention will beapparent to those for facilitating retaining of the stop screw in a skilled in this art during thecourse of the followselected position. The accelerator-valve is opera ing description. atedby the arm Bpivotally connected at the end 35 Regarded incertain of its broader aspects, the B thereof to'the rod-B",whereby the valve may novel accelerator control according to this inbe'opened and,upon occasion, closed; Duringthe vention comprises an arm freely rotatably mountopening 'ofthe valve the portion B. of the arm B e lipon the accelerator Valve S t adjustable in strikes against andis restrictingly engaged with 40 a Selected position and adapted.- to engage W t thestop screw l2car'ried on the portion! la of the o a d st p r o f e v sha e i he elbow lever II. It will be evident from the fore-' 1 valve. going that. freefull opening of the accelerator In order to facilitate a fuller and more complete valve is dependent in a measure upon the posi: understanding of the present invention a specific t of th lb w 1 ver l,

.45 embodiment thereof herein illustrated will be A connector rod l3 pivotally mounted in the;

hereinafter described, it being clearly understood, end p rti l'lb 0f th lb w lever n t however, that the illustrated embodiment, altherefrom ub tantially as shown and is conthough presently prefe i provided solely by nected with other parts" of the device which now way of example of the Practice Of s invention will be described. A straight lever arm l5 toothed and not by way of limitation thereof except ,inalong one edge 15a thereof is mounted in the 50 sofar as the invention is recited in the subjoined bra ket is by the r w H i a manner suchcthat claims. free swinging motion of the lever arm is not pre- Referring then to the drawings, I eluded. A rod f receiving member l8-pivotally Figure 1 is substantially a top plan view ofthe mounted in the distal free end of the arm l5slidpresently preferred embodiment of thisinvention ingly receives the end portion Ila of the connector; 66

rod 13. The connector rod I3 is threaded throughout a major portion of the length thereof and the' end part of the rod is provided with an internally threaded collar [9 for retaining portions of the rod within the rod receiving member l8. A helical spring 20 positioned between washers 25a and compressible by means of the internally threaded collar 20b presses the collar l9 against the rod receiving member l8 whereby theseveral structural elements of the, device occupy essentially the relative positions illustrated in the figures of the drawings. j

A pawl 2| carried'on the shaft 22 journaled in the bracket l6 engagesthe toothed edge portion 15a of the straight lever arm l5 being urged thereagainst by thespring 23 attachedto the pawl and the lever arm. A connector element 24 attached to the straight lever. arm 15 and to the pawl 21 serves to draw the lever after the pawl when the last mentioned is ,moved out of engagement with the toothedportions 1 of the lever. The shaft 22. carryingthe pawl 2| is connected through the flexible, couplings 25 and El and the connector rod 25 to the shaft 28' upon which is mounted the gear. 29 meshing with the gear 30 which inturn is carried upon'and rotatable by the knob 3i mounted on the dashboard D of the vehicle substantially as shown. It is to be noted that the knob 3| is provided with a lock 31a for fixingsame in a selected position and, for convenience in deter-- mining the position of the knob, a pointer 32v cooperating with a dial 32a is provided.

Having described thestructural features of the device according to thepreferred embodiment of this invention, its mode of operation now will be described. 1 Assuming for instance that it is desired to; precludewor at least inhibit operation of the car at a speed notin excess of thirty miles per ho,u.r,,the pointer 32 is adjusted by means of a'knob 3| to the proper relationshipwith respectto .the scale 32a and thereafter the knob is locked in position by the lock em. Rotation of the knob with concomitant rotation of the. gear 38 and meshing gear 29 causes rotation of the shaft 22 whereby the pawl 2! is rotated through; an arc. and the straight lever arm. l5 is drawn thereafter, it being understood of course that when at position of rest the pawl 2| engages with thetoothed edge portion 150, of the lever arm I5. As the lever arm l5 moves, itsmotion isftransmitted through the connector rod [3 to cause rotation of the elbow lever H whereby the position of the adjustable stop-screw I2 is altered. When the operator attempts toaccelerate the vehicle to a degree exceeding the. value indicated by the pointer upon theigraduated scale, the portion B of the arm B abuts against and is. re-v sistingly engaged by the stop screw [2' whereby further opening of the valve A is inhibited. In the event of emergency the .valve A can be further opened by pressing the portion B' of the arm B with greater force against the stop screw l2 under which conditions the spring 20 will be compressed and the valveopened more fully than when the spring is not so compressed.

Having thus described the present invention,

. what'it is desired. to secure by Letters Patent is:

1. An accelerator valve control comprising an v elbow lever freely rotatably mounted upon the accelerator valve shaft and engaging with the valve-operating lever during the openingof the valve; and a ratchet and pawl leversystem for adjustably rotating said elbow lever to inhibit at difierent positions the opening of the valve.

2. An accelerator valve control comprising an elbow lever freely rotatably mounted on the acceleratcr valve shaft; van'arljustable stop on said lever restrictively engaging with the valve operat'ing lever during opening of the valve; a straight lever arm toothed along one edge swing ably mounted near the accelerator valve; a'connector element pivotally. attache dto said elbow lever and with the free end of said straight lever; a pawl, spring-urged toward and engaging the toothed edge of said straight lever arm; a connector element joining said straight lever arnra'nd said. pawl for drawing the lever after thepawl when same is moved out of engagement with *the toothed. edge of the lever; and

' armv toothed along one edge, swingably mounted at one end near the accelerator valve; a rodreceiving member pivotally mounted near the free distal endof said straight lever arm for slidingly receiving said connector rod; an adjustable collar ,on said connector rod; between the rod-receiving member and the free end thereof; a helical spring, sleeved on said rod yieldingly urging said collar against said member; a pawl, spring-urged toward and engaging the toothed. edgeof said straight lever arm; and a connector element attached tosaid straight lever arm and to said pawl for drawing the lever after the pawl when same is moved out of engage- I ment with the toothed edge of the lever.

'- Y LEO M. DE BOLT. 

